Improvement in scroll-saws



Patented March 17, 1874.

3 Sheets--Shet2.

C. T F0 R D.

Scroll-Saws. 10,148,684 Patented March 17, 1874.

CHARLES T. FORD, OF SALEM, MASSACHUSETTS.

IMPROVEMENT IN SCROLL-SAWS.

Specification forming part of Letters Patent No. 148,684, dated March17, 1874; application filr d January 3, 1874.

To all whom it may concern:

Be it known that I, CHARLES T. Form, of Salem, in the county of Essexand State of Massachusetts, have invented a new and valuable Improvementin Scroll-Saws; and I do hereby declare that the following is a full,clear, and exact description of the construction and operation of thesame, reference being had to the annexed drawings, making a part of thisspecification, and to the letters and figures of reference markedthereon.

Figure l of the drawings is a representation of a side view of myscroll-saw. Fig. 2 is a plan, and Fig. 3 a sectional view, of the same.Figs. 4, 5, 6, 7, and 8 are detail views.

This invention relates to certain novel improvements in sawing-machineswhich are especially designed for scroll-work andit consists in novelmeans for adjusting, guiding, sustaining, and actuating the saw; also,in a mode of lubricating the saw-bar, and preventing dust from gettinginto the guides thereof, all as will be hereinafter explained.

The following is a description of my improvement:

In the annexed drawings, A designates the top of a frame, A, on whichthe stufi' is adjusted while it is being sawed. B represents a strongcasting, which is rigidly secured to the frame A in a vertical position,and which is constructed with a horizontal arbor, G on which turns abalance-wheel, O. The hub of this wheel 0 has a bridge-bar, 0 extendingdiametrically across its end, through which a number of holes, 0, aremade for the lower pivotal attachment of a link, D, the upper end ofwhich is pivoted to the arched portion of a vibrating arm, D. Byadjusting the said pivoted attachment of link D into the different holes0, the strokes given to arm D can be shortened or lengthened. One end ofarm D is pivoted at d to an offset of the casting B, and the other endof this arm is slotted vertically and horizontally, and receives throughit the saw-bar E and a connecting-pin, a. (Shown in Fig. 1.) The bar Eplays freely through bearing-guides E E which are formed on anadjustable casting, E, and which are recessed to receive cotton-waste e,or other suitable material which will retain oil about the bar E for along time, and keep this bar well lubricated. The cotton-waste e iscovered by leather pieces 0, through which the bar E closely passes,which pieces will prevent sawdust from getting into the bearings E Thecasting E is secured to the front face of the casting B by means of twoscrews, ff, the lower one, f, of which passes through a slot madethrough casting E, so that by loosening this last-named screw, thecasting E can be adjusted and set in a line perpendicular to thetable-top A, or fixed at any desired angle thereto. By loosening thesaid screws ff, the casting E can be adjusted for giving any desiredrake to the saw, in which position the casting can be maintained byinserting narrow pieces of leather or other suitable substance betweenits upper end and the casting B. The saw S is rigidly secured into theupper end of the bar E by means of a set-screw, s and its uppertoothless portion 8 plays vertically between the guides g g. designatesaplate which is secured in the top A, flush with the surface thereof,and which is constructed with a V-shaped notch, t, in one edge, againstthe sides of which the back edge of the saw is guided. J is an arm, towhich a bracket, F, is adjustably secured, which arm is connected by apivot-rod, r, to two cars, G, on a plate, G. The arm J is thus allowedto rise and descend, and when raised, as indicated in dotted lines, Fig.1, it is sustained by a gravitating-hook, N, on an overhanging rod, N.WVhen arm J is down, it is supported by a horizontal rod, r, fixed tothe ears G ofplate G. The plate Gis securedrigidly to abracket,

,H, by means of bolts 1 01, which pass through a slot made verticallythrough plate G, and

also through beveled clamp-blocks. When the bolts '5 i are loosened, theplate G, together with the pivotal end of arm J, can be adjustedvertically. The bracket F on the free end of the arm J has aright-angular extension, F formed on its lower end, through whichextension is a quadrilateral hole for receiving the two guides g g.These guides g g are removable, adjustable together or separately, andwhen they are properly adjusted they are rigidly secured to the bracketF by means of a set-screw, 8 The lower guide ghas a V-shaped notch, 2,in its end, the sides of which flare downward, for allowing the saw S toreadily UNITED STATES PATENT OFFICE.

CHARLES T. FORD, OF SALEM, MASSACHUSETTS.

IMPROVEMENT IN SCROLL-SAWS.

Specification forming part of Letters Patent No. 148,684, dated March17, 1874; application fihd January 3, 1874.

To all whom it may concern:

Be it known that I, CHARLES T. Form, of Salem, in the county of Essexand State of Massachusetts, have invented a new and valuable Improvementin Scroll-Saws 5 and I do hereby declare that the following is a full,clear, and exact description of the construction and operation of thesame, reference being had to the annexed drawings, making a part of thisspecification, and to the letters and figures of reference markedthereon.

Figure 1 of the drawings is a representation of a side view of myscrollsaw. Fig. 2 is a plan, and Fig. 3 a sectional View, of the same.Figs. 4:, 5, 6, 7, and 8 are detail views.

This invention relates to certain novel improvements in sawing-machineswhich are especially designed for scroll-work andit consists in novelmeans for adjusting, guiding, sustaining, and actuating the saw 5 also,in a mode of lubricating the saw-bar, and preventing dust from gettinginto the guides thereof, all as will be hereinafter explained.

The following is a description of myiinprovement:

In the annexed drawings, A designates the top of a frame, A, on whichthe stuff is adjusted while it is being sawed. B represents a strongcasting, which is rigidly secured to the frame A in a vertical position,and which is constructed with a horizontal arbor, G on which turns abalance-wheel, (J. The hub of this wheel 0 has a bridge-bar, extendingdiametrically across its end, through which a number of holes, 0, aremade for the lower pivotal attachment of a link, D, the upper end ofwhich is pivoted to the arched por tion of a vibrating arm, D. Byadjusting the said pivoted attachment of link D into the different holes0, the strokes given to arm D can be shortened or lengthened. One end ofarm D is pivoted at d to an offset of the casting B, and the other endof this arm is slotted vertically and horizontally, and receives throughit the saw-bar E and a connecting-pin, a. (Shown in Fig. 1.) The bar Eplays freely through bearing-guides E E, which are formed on anadjustable casting, E, and which are recessed to receive cotton-waste e,or other suitable material which will retain oil about the bar E for along time, and keep this bar well lubricated. The cotton-waste c iscovered by leather pieces 6, through which the bar E closely passes,which pieces will prevent sawdust from getting into the bearings E Thecasting E is secured to the front face of the casting B by means of twoscrews, f f, the lower one, f, of which passes through a slot madethrough casting E, so that by loosening this last-named screw, thecasting E can be adjusted and set in a line perpendicular to thetable-top A, or fixed at any desired angle thereto. By loosening thesaid screws ff, the casting E can be adjusted for giving any desiredrake to the saw, in which position the casting can be maintained byinserting narrow pieces of leather or other suitable substance betweenits upper end and the casting B. The saw S is rigidly secured into theupper end of the bar E by means of a setscrew, s and its upper toothlessportion 8 plays vertically between the guides g g. P designates aplatewhich is secured in the top A, flush with the surface thereof, and whichis constructed with a V-shaped notch, t, in one edge, against the sidesof which the back edge of the saw is guided. J is an arm, to which abracket, F, is adjustably secured, which arm is connected by apivot-rod, r, to two cars, G, on a plate, G. The arm J is thus allowedto rise and descend, and when raised, as indi cated in dotted lines,Fig. 1, it is sustained by a gravitating-hook, N, on an overhanging rod,N. When arm J is down, it is supported by a horizontal rod, 1, fixed tothe ears G of plate G. The plate Gis securedrigidly to abracket,

,H, by means of bolts '5 6, which pass through a slot made verticallythrough plate G, and

also through beveled clamp-blocks. When the bolts t' z are loosened, theplate G, together with the pivotal end of arm J, can be adjustedvertically. The bracket F on the free end of the arm J has aright-angular extension, F formed on its lower end, through whichextension is a quadrilateral hole for receiving the two guides g 9.These guides g g are removable, adjustable together or separately, andwhen they are properly adjusted they are rigidly secured to the bracket13 by means of a set-screw, s". The lower guide ghas a V-shaped notch,2, in its end, the sides of which flare downward, for allowing the saw Sto readily W point, 8

find its proper position in the notch when the arm J is brought down tothe position shown in full lines, Fig. 1. The guide g, on top of guide 9has a rectangular notch, 3, made into one of its side edges, throughwhich the saw passes. The upper portion 8 of the saw S presents paralleltoothless edges, which terminate at the upper end of the blade in abeveled The lower portion of the saw is toothed, and otherwiseconstructed like the well-known scroll-cutting saws. The back edge ofthe saw S is held against the angular edges of the guides P and g bymeans of one of the edges forming the quadrilateral guide g, and when itis thus held it is prevented from lateral vibration. At the same time itis firmly sustained both above and below the stuff which is being sawed.For thin stuff the upper guides g g may be omitted or raised out of theway.

In practice I shall construct the casting B with a receptacle, R,communicating with the interior of the hub of the balance-wheel O, asshown in Fig. 3, in which receptacle cottonwaste will be packed and keptwell saturated with oil, thus allowing the balance-wheel or pulley G torun free.

hat I claim as new, and desire to secure by Letters Patent, is- V 1. Theadjustable casting E, constructed with guides E recessed and packed, asdescribed, and covered with leather 6, in combination with thereciprocating saw-carrying bar E substantially as described.

2. The arm J, pivoted at a" to a Verticallyadjustable plate, G, incombination with the adjustable bracket F, carrying upper guides for thesaw S, substantially as described.

3. The downwardly-flaring V-shaped guide 9, combined with theholding-guide g, and made adjustable in the bracket F, substantially asdescribed.

In testimony that I claim the above, I have hereunto subscribed my namein the presence of two witnesses.

CHARLES T. FORD.

\Vitnesses:

JOHN W. PORTER, WEBsrER F. PVUTNAM.

